Home / 103,990.13-143,506.35-56,243.47

Finding the Fourth Proportional to 103,990.13, 143,506.35 and 56,243.47

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Solution

The fourth proportional to 103,990.13, 143,506.35 and 56,243.47 is: 77,615.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,990.13 : 143,506.35 = 56,243.47 : x
  2. Step 2: Convert to fraction form
    103,990.13/143,506.35 = 56,243.47/x
  3. Step 3: Cross multiply
    103,990.13x = 143,506.35 × 56,243.47
  4. Step 4: Simplify right side
    103,990.13x = 8,071,295,001.34
  5. Step 5: Solve for x
    x = 8,071,295,001.34/103,990.13
  6. Step 6: Final answer
    x = 77,615.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.